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(11) | EP 2 546 572 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
| published in accordance with Art. 153(4) EPC |
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| (54) | DIE-CASTING LED ENERGY-SAVING LAMP |
| (57) A die-casting LED energy-saving lamp, comprises a lamp mask (1), LED light source
components (2), a lamp body (3), an insulated shell (4), a drive power supply (5)
and a lamp head (6). A plurality of straight heat radiation fins and heat radiation
grooves are uniformly arranged around the external edge of the lamp body (3). A flat-bottom
heat-conductiveround platform with a groove around it is arranged on the top of the
lamp body (3). LED light source components (2) are fixed on the surface of the flat-bottom
heat-conductive round platform. The lamp mask (1) is embedded in the groove of the
flat-bottom heat-conductive round platform. A column cavity is formed in the center
of the heat radiation structure of the lamp body (3). The drive power supply (5) and
the insulated shell (4) are inserted into the column cavity after being integratively
assembled. The insulated shell (4) is fixed with the bottom of the flat-bottom heat-conductive
round platform. The lamp head (6) is fixed on the end of the insulated shell (4) far
from the LED light source components (2), and is insulated from and fixed with the
metallic lamp body (3). |
TECHNICAL FIELD
[0001] The present invention relates to a die-casting LED energy-saving lamp, and more particularly, to an LED energy-saving lamp, of which the light source is power LED. The present invention belongs to the technical field of semiconductor lighting.
BACKGROUND OF THE INVENTION
[0002] Incandescent lamps have been used in lighting for a period of time, but now they are nearing their ends. Under the backgrounds of global climatic changes and energy shortages, it is of great concern to seek more energy saving lighting schemes. The LED energy-saving lamp is a new kind of environmental-friendly, high efficient, safer and more reliable lighting fixture.
[0003] Due to lighting effect and production cost, currently the LED energy-saving lamp is not competitive against the traditional high efficient light sources in the field of wide area white lighting and flood lighting. But the LED energy-saving lamp has incomparable advantages over the traditional light sources in fields of low power lighting, local lighting or safety lighting. In general, either low power LEDs or high power LEDs may be used to produce the LED energy-saving lamp. Practice proves that the light decay of the low power LED is faster than that of the high power LED, although the production cost of the low power LED is lower than that of the high power LED. What's more, too many low power LEDs are required in the LED energy-saving lamp, so it is inconvenient in assembling. Additionally, the LED energy-saving lamp produced with low power LEDs commonly has low lighting effect and short lifetime, and accidents due to too high temperature may be caused during the operation of the LED energy-saving lamp. In consideration of the above, it is more reasonable to produce the LED energy-saving lamp with high power LEDs.
SUMMARY OF THE INVENTION
[0004] On account of the defects in the prior art, the present invention aims at providing a die-casting LED energy-saving lamp, which is provided with an LED light source module comprising LEDs with power of one or more watts, to solve the problems of serious light decay and heat dissipation of the traditional low power LEDs. Also the present invention provides a producing scheme with simple process and low cost, so as to promote the timely implementation of new technologies.
[0006] A die-casting LED energy-saving lamp, comprising a lamp mask, an LED light source module, a lamp body, an insulated casing, a driving power supply and a lamp holder, wherein, a plurality of straight heat dissipating fins and heat dissipating grooves are uniformly arranged around an outer wall of the lamp body; top of the lamp body of the high power energy-saving lamp is provided with a flat-bottomed heat-conducting round platform which has a groove along its periphery; the LED light source module is fixed on a surface of the flat-bottomed heat-conducting round platform; the lamp mask is fixed to the flat-bottomed heat-conducting round platform with the aid of the groove; an inner cavity is formed in center of heat dissipating structure of the lamp body; the driving power supply and the insulated casing are disposed in the inner cavity; the insulated casing is connected and fixed to a bottom of the flat-bottomed heat-conducting round platform; the lamp holder is connected and fixed to one end of the insulated casing, which is far from the LED light source module; and the lamp holder is fixed to and insulated from the lamp body.
[0007] Preferably, with respect to the die-casting LED energy-saving lamp above, the LED light source module a metal circuit board and monochromatic or polychromatic LEDs with power of one or more Watts, which are attached on a heat dissipating LED substrate; the LEDs are individually or integrally packaged and attached; and a light exit of the LED light source module corresponds to a position of the lamp mask.
[0008] Preferably, the lamp mask is made of glass, colophony or a mixture of polycarbonate, which has a light transmittance of over 95%; the lamp mask has a shape of a semisphere, spheroid, a column or a prism; and an inner wall of the lamp mask is frosted or additionally provided with intensifying coatings.
[0009] Preferably, the groove has several outwards concaves along an inner side of its outer wall, and the outer periphery of the outer wall forms a circumferential rib; and the lamp mask is fixed in the groove of the lamp body by adhesive. Preferably, inner walls of the groove are provided with threads; and the lamp mask is fixed in the groove by means of the threads. Preferably, bottom of the groove is provided with screw holes; and the lamp mask is fixed in the groove with screws. Preferably, the lamp body made of aluminum or aluminum alloy is provided with straight heat dissipating fins and heat dissipating grooves; the outer edge of the heat dissipating fin is chamfered and circular, and the bottom of the heat dissipating groove forms a semi circle processed by die casting and cutting; and surfaces of the heat dissipating grooves are processed by sandblasting, oxidizing and polishing.
[0010] Preferably, the insulated casing is cylindrical; a slot is formed in an inner cavity of the cylindrical insulated casing by die-casting; and the drive power supply is inserted in the slot.
[0011] Preferably, the drive power supply is provided with a rectangular printed circuit board; the cylindrical insulated casing has a semicircular opening at the top, the other part of the top forms a closed semicircular surface, at the central position of which is provided with a screw hole; and the insulated casing is fixed on the lamp body with screw.
[0012] Preferably, the lamp holder of the LED energy-saving lamp is a metal interface, and is riveted to the insulated casing along an inner periphery of the lamp holder; and the metal interface is an E-27 radioceramic screw lamp holder made of nickel-plated copper.
[0013] The present invention has better stability and longer lifetime than the traditional incandescent tube or the low pressure fluorescent lamp. What's more, the lamp body of the energy-saving lamp designed by means of die casting has good performance of heat dissipation and provides convenience for quick assembling of LED products. The LED energy-saving lamp used for lighting radiates soft light, has beautiful appearance and colors, also has qualities of low loss, lower energy consumption and green environmental protection. The die-casting LED energy-saving lamp is apt for being widely used for prolonged lighting in families, shops, banks, hospitals, hotels, restaurants and other public places.
[0014] The die-casting LED energy-saving lamp of the present invention will be described in more details with reference to the embodiments and the accompanying figures in order to make the technical schemes of the present invention easily understood and grasped.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015]
Fig.1 is an exploded view illustrating an embodiment of the die-casting LED energy-saving lamp of the present invention;
Fig.2 is a sectional view illustrating the structure of the die-casting LED energy-saving lamp shown in Fig.1;
Fig. 3 is a stereogram illustrating the assembled die-casting LED energy-saving lamp shown in Fig.1.
[0016] The elements in the above figures are denoted as follows:
1 ~ lamp mask; 2 ~ LED light source module; 3 ~ lamp body;
4 ~ insulated casing; 5 ~ driving power supply; 6 ~ lamp holder;
7 ~ light-emitting diode (LED); 8 ~ metal circuit board.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0017] Fig.1 is an exploded view illustrating an embodiment of the die-casting LED energy-saving lamp of the present invention, and Fig. 3 is a stereogram illustrating the assembled die-casting LED energy-saving lamp shown in Fig.1. As shown in Figs.1 and 3, the die-casting LED energy-saving lamp comprises a lamp mask 1, an LED light source module 2, a lamp body 3, an insulated casing 4, a driving power supply 5 and a lamp holder 6 for electric connection.
[0018] Top of the lamp body 3 of the high power energy-saving lamp is provided with a flat-bottomed heat-conducting round platform. The LED light source module 2 is fixed on a surface of the flat-bottomed heat-conducting round platform fixed on the top of a heat dissipating structure of the lamp body 3. The flat-bottomed heat-conducting round platform has a groove along its periphery, and the lamp mask 1 is assembled on the lamp body 3 with the aid of the groove. Heat dissipating fins and heat dissipating grooves are uniformly arranged around an outer wall of the lamp body 3, and constitute the heat dissipating structure of the lamp body 3. An inner cavity is formed in the center of the heat dissipating structure of the lamp body 3, and the cylindrical insulated casing 4, which is fixed with the driving power supply 5, is disposed in the inner cavity. The cylindrical insulated casing 4 is connected and fixed to an upper portion of the lamp holder and a bottom of the flat-bottomed heat-conducting round platform of the lamp body.
[0019] The LED light source module 2 comprises a metal circuit board 8 and monochromatic or polychromatic LEDs 7 with power of one or more Watts. The LEDs 7 are individually or integrally packaged and attached on a heat dissipating LED substrate by thermally conductive adhesive. The heat dissipating LED substrate is, namely, the metal circuit board 8. The lamp mask 1 is disposed at a light exit of the LED light source module 2. The heat dissipating LED substrate is embedded and fixed with the aid of the groove at the top of the inner cavity of the lamp body. The LED light source module may be disposed above the groove at the top of the inner cavity of the lamp body.
[0020] Top of the flat-bottomed heat-conducting round platform is provided with a flat-bottomed boss, and the groove is annular and located along the periphery of the flat-bottomed boss. The metal circuit board 8 of the LED light source module 2 is fixed on the flat-bottomed boss, and the lamp mask 1 is fixed to the groove. The lamp mask 1 may have a shape of a semisphere, a column or a prism, and an inner wall of the lamp mask may be additionally provided with an intensifying coating or may be frosted. The lamp mask 1 is made of glass, colophony or a mixture of polycarbonate, which has a light transmittance of over 95%. The lamp mask 1 is not only shatterproof, dustproof and antiaging, but also has a grinding effect. The light shining through the lamp mask is soft and even, free from glare, and has a high lamp flux. The lamp mask is safe and reliable, and can be processed by simple processing method. Preferably, the groove has several outwards concaves along an inner side of its outer wall, and the outer periphery of the outer wall forms a circumferential rib. The lamp mask 1 is fixed on the lamp body 3 by adhesive. The groove provides convenience for fixing the lamp mask, also prevents attaching and fixing adhesive from overflowing excessively, so that the installation and maintenance of the lamp mask is easier.
[0021] The lamp body 3 with heat dissipating function is made of metal, which is usually aluminum or aluminum alloy. The lamp body 3 is processed by machining such as die casting, cutting and so on. A plurality of straight heat dissipating fins and heat dissipating grooves are uniformly arranged around the outer periphery of the lamp body 3. The outer edge of the heat dissipating fin is chamfered and circular, and the bottom of the heat dissipating grooves forms a semi circle. Surfaces of the heat dissipating fins and heat dissipating grooves are processed by sandblasting, oxidizing and polishing, in order to increase the area of heat dissipating surface, speed up heat dissipating and improve heat dissipating effect.
[0022] The LED light source module 2 may be disposed above the groove on the top of the inner cavity of the lamp body. In order to increase the luminous efficiency of the die-casting LED energy-saving lamp, light emergence angle and position of the light source can be adjusted by changing the height of the flat-bottomed heat-conducting round platform on the top of the inner cavity of the lamp body.
[0023] As shown in Fig.2, the lamp body 3 and the cylindrical insulated casing 4 are connected with built-in bolts or other detachable connectors. The cylindrical insulated casing 4 is disposed inside the inner cavity of the lamp body 3, and the driving power supply 5 is enclosed in the cylindrical insulated casing 4. The cylindrical insulated casing 4 has a semicircular opening at the top, the other part of the top forms a closed semicircular surface, at the central position of which is provided with a screw hole, in order to fix the cylindrical insulated casing 4 firmly at the bottom of the flat-bottomed heat-conducting round platform of the lamp body 4. Additionally, the driving power supply 5 is connected with electrodes of the LED light source module 2 through wire to form electrical connections.
[0024] Preferably, the lamp holder 6, a constituent part of the LED energy-saving lamp, is a metal interface, and the metal interface may be an E-27 radioceramic screw lamp holder made of nickel-plated copper or any other standard lamp holders. The inner side of the metal interface is provided with first threads which match with second threads at the bottom of the cylindrical insulated casing 4, so that the lamp holder can be riveted to the cylindrical insulated casing 4 along its inner periphery.
[0025] In a word, the die-casting LED energy-saving lamp has better stability and longer lifetime than the incandescent tube or low pressure fluorescent lamp. What's more, the die-casting LED energy-saving lamp radiates soft light, has beautiful appearance and colors, also has qualities of low loss, lower energy consumption and green environmental protection. It is widely used for prolonged lighting in families, shops, banks, hospitals, hotels, restaurants and other public places.
1. A die-casting LED energy-saving lamp, comprising a lamp mask, an LED light source
module, a lamp body, an insulated casing, a driving power supply and a lamp holder,
wherein, a plurality of straight heat dissipating fins and heat dissipating grooves
are uniformly arranged around an outer wall of the lamp body (3); a top of the lamp
body of the high power energy-saving lamp is provided with a flat-bottomed heat-conducting
round platform which has a groove along its periphery; the LED light source module
is fixed on a surface of the flat-bottomed heat-conducting round platform; the lamp
mask is fixed to the flat-bottomed heat-conducting round platform with the aid of
the groove; an inner cavity is formed in center of heat dissipating structure of the
lamp body; the driving power supply and the insulated casing are disposed in the inner
cavity; the insulated casing is connected and fixed to a bottom of the flat-bottomed
heat-conducting round platform; the lamp holder is connected and fixed to one end
of the insulated casing, which is far from the LED light source module; and the lamp
holder is fixed to and insulated from the lamp body.
2. The die-casting LED energy-saving lamp according to claim 1, wherein, the LED light
source module comprises a metal circuit board and monochromatic or polychromatic LEDs
with power of one or more Watts, which are attached on a heat dissipating LED substrate;
the LEDs are individually or integrally packaged and attached; and a light exit of
the LED light source module corresponds to a position of the lamp mask.
3. The die-casting LED energy-saving lamp according to claim 1, wherein, the lamp mask
is made of glass, colophony or a mixture of polycarbonate, which has a light transmittance
of over 95%; the lamp mask has a shape of a semisphere, a column or a prism; and an
inner wall of the lamp mask is frosted or additionally provided with intensifying
coatings.
4. The die-casting LED energy-saving lamp according to claim 1, wherein, the lamp body
is provided with the groove for assembling or fixing the lamp mask; the groove has
several outwards concaves along an inner side of its outer wall, and outer periphery
of the outer wall forms a circumferential rib; and the lamp mask is fixed in the groove
of the lamp body by adhesive.
5. The die-casting LED energy-saving lamp according to claim 1, wherein, the lamp body
is provided with the groove for assembling or fixing the lamp mask; inner walls of
the groove are provided with threads; and the lamp mask is fixed in the groove by
means of the threads.
6. The die-casting LED energy-saving lamp according to claim 1, wherein, the lamp body
is provided with the groove for assembling or fixing the lamp mask; a bottom of the
groove is provided with screw holes; and the lamp mask is fixed in the groove with
screws.
7. The die-casting LED energy-saving lamp according to claim 1, wherein, the lamp body
made of aluminum or aluminum alloy is provided with straight heat dissipating fins
and heat dissipating grooves; the outer edge of the heat dissipating fin is chamfered
and circular, and the bottom of the heat dissipating grooves forms a semi circle processed
by die casting and cutting; and surfaces of the heat dissipating grooves are processed
by sandblasting, oxidizing and polishing.
8. The die-casting LED energy-saving lamp according to claim 1, wherein, the insulated
casing is cylindrical; a slot is formed in an inner cavity of the cylindrical insulated
casing by die-casting; and the drive power supply is inserted in the slot.
9. The die-casting LED energy-saving lamp according to claim 8, wherein, the drive power
supply is provided with a rectangular printed circuit board; the cylindrical insulated
casing has a semicircular opening at the top, the other part of the top forms a closed
semicircular surface, at the central position of which is provided with a screw hole;
and the insulated casing is fixed on the lamp body with screw.
10. The die-casting LED energy-saving lamp according to claim 1, wherein, the lamp holder
of the LED energy-saving lamp is a metal interface, and is riveted to the insulated
casing along an inner periphery of the lamp holder; and the metal interface is an
E-27 radioceramic screw lamp holder made of nickel-plated copper.